GEOG 2013 Lecture 7: GEOG2013 WEEK 4
15 Aug 2015
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Document Summary
Spacial distribution of solar radiation amount of solar radiation reaching surface depends on : extraterrestrial radiation present on top of atmosphere. 2. reduction extraterrestrial radiation due to backscattering and absorption: solar angler. 4. local conditions: amount of water molecules and clouds = variables, nuclear winter = precipitates reflect solar radiation. Energy balance energy input energy output = change in energy storage energy input = absorbed radiation energy output = radiation emitted storage of energy determines temperature change in energy balance is radiative forcing (rf value) Effective radiating temperature the temp at which a system radiates away as much energy as stored solar radiation absorbed = terrestrial radiation emitted. 255 k (-18 c) but 10 c with greenhouse gases. Global energy budget clouds absorb all lw radiation, reflect some sw radiation net raditation = difference between absorbed and emitted radiation need to have energy transfer from surface to atmosphere.
